Ventilator.



No. 634,2I5. Patented0ct. 3, I899. c. F. mcxansou.

VENTILATOIL (Application flled Apr. 1, 1899.)

(Ni) Modal.)

UNiTED STATES PATENT FFECEl CHARLES F. NIOKERSON, OF READING, MASSACIIUSETTS.

VENTILATOR.

SPECIFICA1ION forming part of Letters Patent No. 634,215, dated October 3, 1899.

Application filed April 1, 1899. Serial No. 711,342. (No model.)

T0 all whom it may concern:

Be it known that I, CHARLES F. NICKERSON, a citizen of the United States, residing in Reading, in the couhty of Middlesex and State ventilation, provided the position of the ventilator is such as to allow of the passage throngh it of a draft of air. v

The nature of the invention is fully described in detail below, and illustrated in the acoompanying drawings, in which Figure 1 is a side elevation of my improved ventilacor in position ou a chimney. Fig. 2 is an end view looking toward the direction froin whioh the wind is coming. Fig. 3 is a longitudinal vertical section of the same. Fig. 4 is a horizontal section taken on line X,

Similar letters of reference indioate corresponding parts.

A represents an ordinary chimney.

B is a pipe or fine monnted vertically in the ohimney and extending slightly np therefrom. This fine may be of any desired length and may extend as far aboVe the upper end of the chimney as is deemed advisable. The npper end of this fine is provided With a spider O, fixed horizontally therein and eentrally perforated, as shown in Fig. 4, t0 reeeive the vertical rod or spindle D, whieh is prevented from dropping by the collar D. This spindle extends np through the conical horizontal funnel E, the horizontally-set hollow conical defiector F, and the cnrved eross-piece H, and on its npper end is monnted the hnb K of the rndder or vane K, all of said parts being free to rotate on said spindle.

The horizontal fnnnel E is cone-shaped, as shown, and its smaller endthat is, the end toward the wind-is provided with a flaring month E. The defiector F is set horizontally within the fnnnel and is hollow and elosed at its s1i1aller end. Its limes are nearly parallel with those of the fnnnel; but the angle of the sides of the defiector is somewhat more obtnse than that of the sides of the tunnel in order that the annnlar space between the defiector and-funnel may be somewhat larger toward the entering end of the latter. The lower side of the defiector F is provided with an opening F, from the'edges of Which a vertical pipe or fine F extends down over and aronnd the fine B. The lower end of this pipe F is tnrned in at fagainst the fine B sufficiently to prevent any bod y of air from entering the pipe F at that point, but not enongh to interfere with the free rotation of said pipe F aronnd the fine B. A vertical partition L is placed within the defiector F near the opening F and between it and the smaller end of said defiector for the pnrpose of preventing the air which passes from the fine and pipe B F into the defiector from workin'g toward the small end of the latter. The defiector and fnnnel are soldered together at the point g where the pipe F extends throngh the funnel. A pin h extends horizontally throngh the spindle D between the upper side of the onrved cross-pieoe H and the defiector F and prevents the ventilator frorn hein g lifted, said cross-piece being secnr ed at its opposite ends to the inner surface of the defiector. The vane or rndder K is rigidly seenred in a vertical position to the upper side of the fnnnel E and broadens at its end and extends looyond the larger end of the fnnnel, and said larger end of the tunnel extends for a little distance beyond the open end of the defiector F. Snitable braces P extend from opposite sides of the rndder or vane to the funnel.

In operation the vane or rudder K swings the ventilator in line With the direction of the wind and with its smaller end toward the wind. The external air enters the fnnnel at the fiared mouth E, passes in the direction of the arrows between the defiector and the fnnnel, and thence by the month of the defiector ont throngh the larger end of the fnnnel. The air from the chimney passes up through the fine B and the spider C into the pipe F, and thence throngh.the opening F into the defiector F, and thence throngh the mouth of the defiector into and ont throngh the month of the fnnnel, all as indicated by the arrows. By a well-known natnral law the throngh the month of the defiector, said air from the defieetorpassing quickly outin order to prevent a vacuum at that point. Moreover, the gradually-narrowing passage between the defieetor and fnnnel tends to aocelerate the speed oftheexternalairpassingthronghit,and hence t0 inerease the velocity of nhe air passing out through t-he monbh of the defieetor.

Having thus fully desoribed 1ny invention, what I daim, and desre to seenre by Letters Patent, is

The herein-described improved ventilator, comprising the fine B; the vertical spindle D extending np from the upper end of said fine; the horizontal cone-shaped funnel E monnted on said spindle and adapted to present its sma]ler end toward the wind; a rndder 0 3 vane monnted rigidly on the fnnne1 at the larger end uhereof, that is, the end opposite that which is presented to the wind; the 1101- 1ow conical defieetoi F set horizontally and eentra]ly within said funnei wiLh the pointed end thereof toward the wind and toward the smaller end ofhe funnel, and being smaller in diameter and shorter in length than said funnel; and the pipe F rigid WiLh said defiector and extending downward through the lower wa1l of the funnel and around the fine B, snbstantially as and for the purpose set forth.

CHARLES F. N ICKERSON. \Vitnessesz HENRY W. WILLIAMS, A. N. BONNEY. 

